Improvement in gasaliers



UNITED STATES PATENT OFFICE.

JOHN H. SEAMAN, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN GASALIERS.

Specification forming part of Letters Patent No. 116,35S,dated June 27,1871.

To all whom it may concern.'

Beit known that I, J oEN H.l SEAT/LAN, of the city of Brooklyn, countyof Kings and State of New York, have invented certain new and usefulImprovements in Gasaliers, Pendants, and other similar Fixtures forBurning Gas; and I do hereby declare that the following is a full andcorrect description thereof, reference being had to the annexed drawingand to the letters of reference thereon.

My said invention relates to gasaliers or chandeliers for burning gas,that are suspended from a gas-pipe in the ceiling, and are adjustable atdifferent heights by means of a sliding' stem.

The sliding stems of gas-iixtnres heretofore used have required packingor a water-sealed joint, because the gas-way is through the fixed pipeupon which the stem slides up and down; but whether packing or awater-joint is used in suoli fixtures they are undesirable because ofthe disagreeable smell from the exposed surface ofthe fixed pipe whenthe gasalier is lowered, and also because of the escaping gas from suchnecessarily imperfect means of connement.

In my improved gasalier I cut oft' the gas en tirely from the slidingjoint within the stem, by a sheath or guide suspended within the stem,and use the vertical fixed pipe merely as a guide for the sliding of thestein, and obtain an extensible gas-way by a folding-pipe which connectsthe sliding stem with the fixed upper part of the fixture attached tothe supply-pipe projecting from the'ceilin g.

The first part of my invention consists in combining with the slidingstem an inner guide or sheath cnt off' from the gas within the stem, aflxed guide projecting downward from the fixed part of the gasalier andreceived in the inner guide or sheath within the stem, the fixed guideand its corresponding guide or sheath within the stem forming no part ofthe gas-way of the stem, the gas-way of the stem bein g the annulus orspace or spaces between the internal guide and the stem, and notconnected with the interior ofthe fixed guide, so that the stem slidesloosely and freely up and down upon the fixed guide,said combinationbeing substantially as hereinafter described; and my invention furtherconsists in combining with a stem and guide, constructed as abovedescribed, a folding gas-pipe, having a central folding joint, said pipebeing connected with the stem and with the gas-way of the fixed upperpart of the gasalier attached to the supplypipe, the whole substantiallyas hereinafter described. My invention also consists in combining andarranging with the sliding stem and hollow fixed guide a cord and springbarrel, to counterbalance the weight of the movable part of the pendantor chandelier, substantially as hereinafter described.

Figure l of the drawing represents a front elevation of' a pendant ortwo light gasaliers, constructed with my improvements; Fig. 2, a sideelevation of the saine, partly in section; Fig. 3, a transverse sectionthrough dotted lines w Fig. 2; Fig. 4, a transverse section throughdotted lines y y, Fig. 2; Fig. 5, top view of the stemcap, showing asection of hollow guide and cord.

a represents the stem; b, a cap on top of the stem, with a square holein the middle, which embraces the top of the internal guide or sheath c,which is a pipe suspended within the stem, and open at the top toreceive the guide, and hermetically sealed at the bottom c to preventthe escape of gas upward through it. The lower part of the stem is openand connected by a screwjoint to the cast centerl d, which is chambered,as usual, to continue the gas-way to the branches d1 d2, which carry thegas-burners. The internal guide or sheath is made of square pipe, asshown in the drawing, to correspond with the fixed guide e, which isalso four-sided; but both may be made of round pipe, if desired. Ineither case, the gas-way of the stem is the annulus or space or spacesbetween the internal guide or sheath and the stein. The interior of theinter nal guide or sheath is entirely cut oft from the gas-way of thestem by the closed lower end, and by the cap that holds .its upper endand covers the gas-way of the stem. f represents the xed part of thependant to be attached by the stift' screw-joint y to a supply-pipeprojecting downward from the ceiling. The gas-way of this fixed part isthrough the stiiil joint g, a chamber in the upper part of the fixedpart, and a small pipe, h. rlhe folding gas-pipe t' has a centralfolding joint, il, and connects with the pipe h by a turning joint, i2,and with the stem by another turning joint, t3, which connects with thecap of the stein, as shown in the drawing,` the cap being chambered, asshown, to connect the gas-way with the stem. The folding pipe i has afolding umass placed in the iXed part j' of the pendant counterbalancesthe weight of the sliding parts, being connected thereto by arcord orchain, k, which passes down through the iiXed guide, made hollow forthat purpose, and may be Vsecured at the bottom of the internal guide o;but I prefer to make part ofthe connection of wire, the wire forming thelower part k', being secured to the bottom of the internal guide, andconnected to the cord or chain by a hook and loop (not shown in thedrawing) at a point a little above the top of the stem, which may bedone by putting the cord down below the vertical guide before mal:- ingthe connection.

I do not claim as my invention anything described or shown in the patentto Charles Deans, July 19, 1870.

I claim as my invention and improvement in suspended gasaliers orchandeliers for burning gas, that are adjustable at different heights bya sliding` steml. In combination with a fixed guide projecting downwardfrom the fixed part of the gasalier, a' sliding' stem to which thebranches are connected, and which has within it an internal sheath orguide cut oii from the gas-way ofthe stem, and open at the top toreceive the fixed guide, substantially as hereinbefore described.

i 2. In combination with the fixed;V guide and Y the sliding stem withits internal guide, the folding gas-pipe, which connects the gas-wayofthe stem' with that of the fixed part connected with the source ofiSupply, substantially as described. 3. The arrangement ot' the springbarrel and cord-connection, in combination with the hollow fixed guideand sliding stem, substantially as described.

4. A folding gaspipe connection, in combination with a sliding-pipe andguide, when the folding pipe has a single middle joint, and is soarranged as to fold close to the stem, substantially as hereinbeforedescribed and shown.

JOHN H.. SEAMAN.

Witnesses ARTHUR D. WILLIAMS,

WM. F. LETT.

